Make sure you have your billing info added in OpenAI Billing page. Without billing info, your API key will not work.

A license key activates PDF Pals: you get it when you buy a license on pdfpals.com. An API key comes from an AI provider such as OpenAI, Anthropic or Google, and lets PDF Pals use that provider's models. An API key is optional in PDF Pals v2, which has built-in local models.

Yes. OpenAI bills API usage separately from PDF Pals, and we don't sell API keys. You can also use another provider, or local models with no API key at all.

No. A ChatGPT Plus subscription doesn't include an API key, and PDF Pals doesn't need one. If you want to use OpenAI's models, you need an OpenAI API key. You can see more info on how to get one here: https://openai.com/blog/openai-api